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Bragg gratings in silicon-on-insulator waveguides by focused ion beam milling

Moss, David J; Ta'eed, Vahid G; Eggleton, Benjamin J; Freeman, Darren; Madden, Steve; Samoc, Marek; Luther-Davies, Barry; Janz, S; Xu, D-X


We report Bragg grating structures fabricated by focused ion beam milling in optical waveguides, and demonstrate that they can be used as a powerful diagnostic of optical modes in very high index waveguides. We show that higher-order lossy modes, which can be present in large numbers even in single-moded silicon-on-insulator waveguides, can dramatically affect the optical transmission spectra of Bragg gratings in these waveguides, even though these modes are normally not observable. Our results...[Show more]

CollectionsANU Research Publications
Date published: 2004
Type: Journal article
Source: Applied Physics Letters
DOI: 10.1063/1.1824182


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